Mini roller



FIG. 1 is a perspective view of an embodiment of a mini roller showing our new design;

FIG. 2 is a first side view thereof;

FIG. 3 is a second side view thereof;

FIG. 4 is a bottom side view thereof;

FIG. 5 is a top side view thereof;

FIG. 6 is a back view thereof; and,

FIG. 7 is a front view thereof.

The broken lines illustrate portions of a mini roller that form no part of the claimed design. 

CLAIM The ornamental design for a mini roller, as shown and described. 